The method of least squares with the foundations of probability theory by A. C. Chebotareva is a unique publication that combines deep immersion in mathematical concepts and practical application of statistical methods. This work will be of interest not only to undergraduate and graduate students studying mathematics and statistics, but also to professionals working in the field of data analysis, economics and engineering .. The book focuses on the least squares method one of the most popular and effective tools for solving regression analysis problems. Chebotarev not only describes the algorithm, but also carefully explains its theoretical foundations, linking them with the concepts of probability theory. This allows the reader not only to master the method, but also to understand how and why it works. The author gives many examples and tasks that help to consolidate the material and see the practical application of the theory. The book will be especially useful for those interested in statistical data analysis, machine learning and econometrics. Students, researchers and practitioners will find in it useful ideas and methods that can be applied in their projects. If you want to deepen your knowledge of statistics and learn how to put them into practice, this publication will become an indispensable assistant. The topics that are raised in the book cover a wide range of issues, ranging from the foundations of probability theory to the complex aspects of data analysis. Chebotarev emphasizes the importance of understanding statistical methods in the modern world, where data play a key role in decision-making. He emphasizes that the correct application of data analysis techniques can significantly affect the results of research and business processes. The author's style is distinguished by clarity and accessibility of presentation, which makes complex mathematical concepts understandable to a wide audience. Chebotarev is known for his other work in mathematics and statistics, and his approach to learning is always focused on the practical application of knowledge. In this book, he continues his tradition, offering readers not only theory, but also real tools for working with data. If you are looking for literature on topics such as statistics, data analysis, regression analysis, or probability theory, the “Lesser Squares Method with Basics of Probability Theory” will be a real find for you. This book is not just a textbook, but a whole guide to the world of mathematical methods that will help you confidently navigate the complex issues of data analysis. In conclusion, The Method of Least Squares with Fundamentals of Probability Theory is not just a book, but an important step towards understanding and mastering statistical methods. It will help you develop analytical thinking and learn how to put knowledge into practice, which is an integral part of a successful career in any data-related field. Do not miss the opportunity to immerse yourself in the world of mathematics and statistics with the help of this fascinating and informative publication!